Interaction Research on Increase of Urban Construction Land and Decrease of Rural Residential Area in Shunyi District of Beijing City

The rural-urban fringe is the region where land use variation is the most active in the suburban expansion of a city.Taking Shunyi District,one of the new towns being developed in the City of Beijing,based on the land use analysis of urban construction land and rural residential areas in Shunyi District during 1996 to 2006,this paper discovers that urban construction land and rural residential areas were characterized by rapid increase and led to the farmland impropriation equal to 1/5 of the total area in the past ten years,which is contrary to the idea,vigorously advocated by the state and Beijing government,of intensive and economical use of construction land and of protecting cropland strictly.So it is urgent to plan and control land use,making urban and rural construction land grow interactively.Furthermore,taking villages as evaluation units,land productivity evaluation system and regional economic development pressure evaluation system were constructed respectively.And with the analysis function of Arcgis6.5 and SPSS11.5,this paper advances four types of regions and provides land use allocation model for the coordinated development of urban and rural areas.